| Issuer | Japan |
|---|---|
| Year | 848-859 |
| Type | Standard circulation coin |
| Value | 1 Mon |
| Currency | Mon (683-1953) |
| Composition | Copper |
| Weight | |
| Diameter | |
| Thickness | |
| Shape | Round with a square hole |
| Technique | Cast |
| Orientation | |
| Engraver(s) | Emperor Ninmyō, Fujiwara Yoshiaki |
| In circulation to | 25 November 0987 |
| Reference(s) | DHJ#1.48 - 1.49 |
| Obverse description | |
|---|---|
| Obverse script | |
| Obverse lettering | 長 寳 年 大 (Translation: Great treasure of many years (read clockwise)) |
| Reverse description | Plain |
| Reverse script | |
| Reverse lettering | |
| Edge | Smooth |
| Mint | |
| Mintage | ND (848-859) - DHJ# 1.48; large size and characters - ND (848-859) - DHJ# 1.49; small size; 大 touches outer rim - |
| Numisquare ID | 2293101900 |
| Comments |